Fly box insert



FIG. 1 is a top perspective view my new design for a fly box insert;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a left-side elevation view thereof;

FIG. 4 is a right-side elevation view thereof;

FIG. 5 is a front elevation view thereof;

FIG. 6 is a rear elevation view thereof;

FIG. 7 is top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is a top perspective view thereof.

The broken lines in the drawings are included for the purpose of illustrating environmental subject matter and form no part of the claimed design. 

CLAIM The ornamental design for a fly box insert, as shown and described. 